minimal-bootstrap: refactor out bootstrap-sources.nix

rec {

  name = "stage0-posix-${version}-${rev}-source";

  # Pinned from https://github.com/oriansj/stage0-posix/commit/bdd3ee779adb9f4a299059d09e68dfedecfd4226

  version = "unstable-2023-04-24";

  rev = "bdd3ee779adb9f4a299059d09e68dfedecfd4226";

  # This 256 byte seed is the only pre-compiled binary in the bootstrap chain.

  # While it is included in the stage0-posix source bundle and is synced with

  # stage0-posix updates, we have split it out into its own derivation to highlight

  # its unique status as a trusted binary seed.

  hex0-seed = import <nix/fetchurl.nix> {

    name = "hex0-seed-${version}";

    url = "https://github.com/oriansj/bootstrap-seeds/raw/b1263ff14a17835f4d12539226208c426ced4fba/POSIX/x86/hex0-seed";

    hash = "sha256-QU3RPGy51W7M2xnfFY1IqruKzusrSLU+L190ztN6JW8=";

    executable = true;

  };

  # Packaged resources required for the first bootstrapping stage.

  # Contains source code and 256-byte hex0 binary seed.

  #

  # We don't have access to utilities such as fetchgit and fetchzip since this

  # is this is part of the bootstrap process and would introduce a circular

  # dependency. The only tool we have to fetch source trees is `import <nix/fetchurl.nix>`

  # with the unpack option, taking a NAR file as input. This requires source

  # tarballs to be repackaged.

  #

  # To build see `make-bootstrap-sources.nix`

  src = import <nix/fetchurl.nix> {

    inherit name;

    url = "https://github.com/emilytrau/bootstrap-tools-nar-mirror/releases/download/2023-04-25/${name}.nar.xz";

    hash = "sha256-hMLo32yqXiTXPyW1jpR5zprYzZW8lFQy6KMrkNQZ89I=";

    unpack = true;

  };

}

lib.makeScope newScope (self: with self; {

  callPackage = self.callPackage;

  # Pinned from https://github.com/oriansj/stage0-posix/commit/bdd3ee779adb9f4a299059d09e68dfedecfd4226

  version = "unstable-2023-04-24";

  rev = "bdd3ee779adb9f4a299059d09e68dfedecfd4226";

  # This 256 byte seed is the only pre-compiled binary in the bootstrap chain.

  # While it is included in the stage0-posix source bundle and is synced with

  # stage0-posix updates, we have split it out into its own derivation to highlight

  # its unique status as a trusted binary seed.

  hex0-seed = import <nix/fetchurl.nix> {

    name = "hex0-seed-${version}";

    url = "https://github.com/oriansj/bootstrap-seeds/raw/b1263ff14a17835f4d12539226208c426ced4fba/POSIX/x86/hex0-seed";

    hash = "sha256-QU3RPGy51W7M2xnfFY1IqruKzusrSLU+L190ztN6JW8=";

    executable = true;

  };

  # Packaged resources required for the first bootstrapping stage.

  # Contains source code and 256-byte hex0 binary seed.

  #

  # We don't have access to utilities such as fetchgit and fetchzip since this

  # is this is part of the bootstrap process and would introduce a circular

  # dependency. The only tool we have to fetch source trees is `import <nix/fetchurl.nix>`

  # with the unpack option, taking a NAR file as input. This requires source

  # tarballs to be repackaged.

  #

  # To build see `make-bootstrap-sources.nix`

  src = import <nix/fetchurl.nix> {

    url = "https://github.com/emilytrau/bootstrap-tools-nar-mirror/releases/download/2023-04-25/stage0-posix-${builtins.substring 0 7 rev}-source.nar.xz";

    hash = "sha256-hMLo32yqXiTXPyW1jpR5zprYzZW8lFQy6KMrkNQZ89I=";

    unpack = true;

  };

  inherit (import ./bootstrap-sources.nix) version hex0-seed src;

  m2libc = src + "/M2libc";

# To build:

#

#   nix-build pkgs/os-specific/linux/minimal-bootstrap/stage0-posix/make-bootstrap-sources.nix

#   => ./result/stage0-posix-0000000-source.nar.xz

#   => ./result/stage0-posix-$version-$rev-source.nar.xz

#

{ pkgs ? import ../../../../.. {} }:

let

  inherit (pkgs) runCommand fetchFromGitHub nix xz;

  inherit (pkgs) callPackage runCommand fetchFromGitHub nix xz;

  inherit (import ./bootstrap-sources.nix) name rev;

  pname = "stage0-posix";

  rev = "bdd3ee779adb9f4a299059d09e68dfedecfd4226";

  shortHash = builtins.substring 0 7 rev;

  src = fetchFromGitHub {

    owner = "oriansj";

    repo = pname;

    repo = "stage0-posix";

    inherit rev;

    sha256 = "hMLo32yqXiTXPyW1jpR5zprYzZW8lFQy6KMrkNQZ89I=";

    fetchSubmodules = true;

  };

in

runCommand "${pname}-${shortHash}-source" {

runCommand name {

  nativeBuildInputs = [ nix xz ];

} ''

  mkdir $out

  nix-store --dump ${src} | xz -c > "$out/${pname}-${shortHash}-source.nar.xz"

  nix-store --dump ${src} | xz -c > "$out/${name}.nar.xz"

''